Heating stove



l2 Sheets-Sheet l INVENTOR. A w00 AT'ORNEYS.

V.. UD

V. L. COOK HEATING STOVE l May 16, 1939.

Filed Aug. 24, 1957 May 16, 1939.

V. L. COOK HEATING STOVE Filed Aug. l24, 1937 2 sheets-sheet 2 2 1 1 1 1 1 Q 312.7. E r

I N VEN TOR.

Patented May 16, 1939 UNITED A.ermite T OFFICE This invention relates to heating stoves, and particularly toA stoves of that type designed'for heating air for circulation'in a room or enclosure to be heated.

The primary object of the invention is'to provide a stove of this character embodying a novel construction and arrangement oftubes for conducting the air through the stove from the bottom portion to the top portion of the' stove and so formed andv disposed as to'heat` a large volume of air within a given time and in a most effective manner with a minimum consumption of fuel.

A further object of the invention is to provide heating tubes grouped "to form a conduit for travel of the products of combustion from a heatH er to an outlet flue so asr to'secure a heating effect on the tubes substantially through the travel of the combustion'products, the lower ends of which tubes are arranged within the area of greatest heat transfer" and so bent at an angle to their upper ends and flattened transversely as to increase the extent of the area thereof exposed directly to the flames of the' heater and simultaneously produce a checking action whereby the speed of flow of air'through the tubes is reduced 'to'promote the'heating of the air flowing therethrough within any given period of time.

With these and other objects in View. the invention consists `of the features of construction, combination and arrangement of parts, hereinafter fully described and claimed, reference being had to the accompanying drawings, in which:

Fig. 1 is a perspective view, with parts in section, of a heating stove embodying my invention.

Fig 2 is a vertical transverse section, on line 2-2 of Fig. 3, through a modified` construction of stove. y

Fig. 3 is a horizontal section on line 3-3 of Fig. 2. f l

Referring now more particularly to Fig. l

of the drawings, a heating stove isshown com-` tanceabove the floor line, and in the upper por tion of the body I is an outlet 9 for the discharge of the combustion heating gases, which communicates with the chamber 6 and With an outlet flue I0.

The bottom head 3 is provided with a central opening II for the passage of the neck portion of a burner l2 of suitable type, the burner portion proper I3 of which extends upwardly and centrally within the lower portion of the chamber 5. This burner may be an oil burner, a gas burner or a burner designed for using any type of fuel, and it may be either permanently or removably secured in position. A burner removably secured in position is shown in the present instance, the body or fount portion of which is secured to the underside of the head 3. At one side of the chamber 5 a doorway or opening I4, closed by a suitable door I5, is provided to permit access to the chamber 5 for cleaning, repairs or other purposes, as Well as for inspection of the burner.

Disposed vertically and axially within the drum I is a series of air heating tubes I6. These tubes extend through the opening 'I in the parttion 4 and are secured to and open at their upper and lower ends through the heads 2 and 3, for the circulation of air upwardly therethrough from the bottom to the top of the stove and through the upper ends of the tubes out into the room or enclosure to be heated. The tubes may be arranged in an annular groove or disposed in any suitable manner so that their portions disposed within the chamber 6 will provide a central passage Il for the upward travel of the products of combustion from the burner substantially throughout the length of the tubes so that the full heating eiiect of such products will be obtained before they exhaust through the outlet 1, the tubes being suitably spaced from one another to allow the products to pass through such spaces and about the tubes and between the passage Il and the circumambient portion of the chamber, so that all surfaces of the tubes will be exposed to the products for a heating action. As shown, the lower vertically disposed inlet ends Iii of the tubes, arranged within the chamber 5, are spaced a greater distance apart than the vertical portions I9 of the tubes mainly disposed within the chamber 6, said lower ends I8 of the tubes being connected with the portions I9 by inwardly offset or bent portions 20 which are arranged so as to project inwardly to lie within the direct heating zone of the burner I3, that is, so as to be contacted by the flames from the burner, whereby the tubes will be directly and highly heated at such points. From this point the ames and products of combustion from the burner travel upward through the opening 1 and in contact with the portions I9 of the tubes, by means of which a highly eiiicient heating action will be secured by direct contact of ythe products with the tubes until such products discharge through the outlet 9. The arrangement is also such that the products of combustion also fill the chamber 6, so that heat by radiation through the Walls of the drum l will also be secured. The heated air issuing from the outlet ends of the tubes l1 may be employed to heat the room or enclosure in which the stove is arranged or by the use of suitable conducting ilues to heat other rooms or enclosures.

At the points 2| where the tube bends 2l) connect With the tube portions I9 the bends are somewhat flattened or otherwise suitably con stricted for the purpose of securing Venturi action or eiiect in producing a pulsating or jet ac tion of a suitable degree to cause the more rapid drawing in of air through the inlet ends of the tubes and a more rapid circulation of the air on their flow through the tubes, by which means a larger volume of air may be caused to pass through the tubes and to be heated Within a given period of time than by the use of tubes of uniform diameter. Thus by the novel formation and arrangement of the offset portions 2.0 of the tubes, which are directly heated by the flames of the burner, and by the provision of the constricted portions 2l and the grouping of the tube portions within the chamber 6, a higher heating effect is obtained, the volume of air iiowing through the tubes increased and a long range heating action obtained allowing a larger volume of air to be heated within a given time at the expenditure of a minimum amount of fuel.

In Figs. 2 and 3 I have shown a modified form of my invention wherein the general construction of the stove is the same, but tubes of modified construction are employed. In this modified construction the lower or inlet ends I8 of the tubes I6 open through the si-desof the wall portions of the drum forming with the head 3. and partition 4 the bottom chamber 5, and said ends of the tubes thence extending horizontally inwardly to points above the burner, where the lower extremities of the body portions I9 of the tubes are disposed in annular formation, which is continued the full distance upward from the inner ends of the portions I8 to the points where the tubes are connected with the upper head 2, As, shown, the inner extremities of the horizontalinlet portions I8 o f the. tubes and the portions of the vertical limbs of the tubes i6 which are disposed inthe chamber 5r are attened or reduced toa substantially elliptical form to increase their lateral extent and amount of ,surface exposed to the names of the burner i3. At

the points of bend between the horizontal andi upright portions of the tubes the tubes are cons tricted as shown at 2i so as to produce the Venturi action or effect heretofore referred to, which is promoted and increased in this structure owing to the flattened tube formation. This type of tube structure has all the advantages of thatr shown in Fig. 1 and in addition provides a greater area of heating surface of the tubes.

exposed directly from theV llames of the burner for the air heating action. The operation of' this form of the invention will be readily understood from that previously explained with reference to the structure shown in Fig. 1.

From the foregoing description, taken in connection with the drawings, the construction of my improved heating stove will be readily understood and it will be seen that it provides a stove for heating air which embodies a novel construction and arrangement of heating tubes by means of which the heating action is increased and the amount of air heated within a given time also increased with the use of a minimum amount of fuel, so that while an increased heating action is obtained a low consumption of fuel is also ensured. While the structures shown are preferred, it will, of course, be understood that changes in the form, construction and arrangement of parts, within the scope of the appended claims.. may be made, without departing from the spirit or sacrificing any of the advantages of the'invention.

What I claim is:

1. A heating stove comprisingy acasing having an outlet flue. for discharge of products of combustion at or near its upper end, a horizontal partition arranged.v below the horizontal center of the casing and dividing said casing into upper and lower chamberasaid partition having a centrai opening, therein for upiiow of products of combustion from the lower chamber to the upper chamber, av burner centrally disposed in the lower chamber of the casing in line with said opening. and agroup of air heatingY tubesextending substantially from top to bottom of the casing through the opening in the partition and annularly arranged. around the opening and open to the atmosphere at their upper and lower ends. the upper portions of said tubes being vertically disposed in the upper chamber in spaced relation toeach other andthe lower portions of said tubes beingy grouped about the burner and spaced from each other, the lower portions of the tubes. lying below and in immediateproxmity to the partition and between the same and the burner beini` bent to provide horizontal branches and. having their bends overlying the burner and constricted to check the flow of air therethrough, at the area. of greatest heat trans-` Ier.

2. A heating stove comprising a casing having an outlet ue for discharge 0f products of combustiony at or near its upper ends, a horizontal partition arranged, below the horizontal center of the casing and dividing said casing into upper and. lower chambers, said; partition having a central opening therein for: upfiow of products of combustionv from the lower chamber to the upper chamber, a burner centrally disposed in the lower chamber of the easingv in line with said opening, and a group ofv air heating tubes extending substantially from top to bottom of the casing through said opening and'annularly arranged around the opening and open to the atmosphere at their upper and lower ends, the upper portions of the tubes being vertically disposed inl the upper chamber in spacedv relation toeachother and. the lower portions of said tubes being grouped about the burner in the lower chamber and spaced a greater distance. apart than their upper portionssaid;lower portions of the. tubes having upper andy lower vertical branches connectedA by bent portions` formingA substantially horizontal branches'disposed belowl and in proximity tothe partition and overlying the. burner and having their bends oonstrictedl to? check the now of' air therethrough at the area of greatest heat transfer.

3. A heating stove comprising a casing having an outlet ue for discharge of products of combustion at or near its upper end, a horizontal partition arranged below the horizontal center of the casing and dividing said casing into upper and lower chambers, said partition having a central opening therein for upow of products of combustion from the lower chamber to the upper chamber, a burner centrally disposed in the lower chamber of the casing in line with said opening, and a group of air heating tubes extending substantially from top to bottom of the casing through the opening in the partition and annularly arranged around the opening and open to the atmosphere at their upper and lower ends, the upper portions of the tubes being vertically arranged in the upper chamber in spaced relation to each other and the lower portions of said tubes being arranged within the lower chamber and bent to provide vertical branches and horizontal branches, the latter being disposed below and in proximity to the partition, and saidl vertical and horizontal branches being connected by bends directly overlying the burner, said branches of the lower portions of the tubes being flattened to increase their heating areas and retard the flow of air therethrough in the area of greatest heat transfer.

VICTOR L. COOK. 

